Opera's own ad blocker or uBlock?

Hi guys. I used to use uBlock for Opera with great results (very efficient, not processor heavy and reliable) but now with the integrated Opera ad blocker I'm unsure which is best in your opinion? Thanks!

If you need control over blocking advertisements or simply need to block some ads manually - Install uBlock. If you do not mind that sometimes some ad can not be locked properly, or you'll sometimes see an ugly empty space on the ads on certain websites - use Opera blocker.

I did not notice the differences in speed both blockers. There is no difference in CPU usage. At least I can not see it.